not cheap ... but very good and recommendable Cover with S-View function for the Galaxy S5

rd. 20 euros for a Handyhülle ... is not exactly cheap ...
but the casing is processed very valuable and fits perfectly (includes also very good) and very functional. The original mobile phone back cover will be replaced by this shell. All functional areas and ports remain easily accessible.
The S-View function is excellent and enhances the mobile so on.
Now the shell holds hopefully long before the purchase was a good investment.

By slightly protruding edges of the envelope, the mobile phone would probably protect well also with falls.
The back bears on something that protects the camera better than without this envelope.

My previous Conclusion: Highly recommended.